To see a display of the names of the PID's (to check what 27% is of what) just press both the left and right buttons at the same time. This will bring up the names for 3/4 of a second.
There are up to 7 PIDs that are used in calculations on every time through the loop. When a user selects them, they are retrieved again just for display. Yes, not optimal at all... but simple.
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